CN107601998A - A kind of voluntarily closely knit concrete formulation and forming method - Google Patents
A kind of voluntarily closely knit concrete formulation and forming method Download PDFInfo
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- CN107601998A CN107601998A CN201711031370.1A CN201711031370A CN107601998A CN 107601998 A CN107601998 A CN 107601998A CN 201711031370 A CN201711031370 A CN 201711031370A CN 107601998 A CN107601998 A CN 107601998A
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Abstract
The invention discloses voluntarily closely knit concrete formulation and forming method, component includes：Cement, flyash, miberal powder, rubble, microlith, coarse sand, fine sand, additive, water, the quality group of each component turn into：Cement 300~405, flyash 80~124, miberal powder 47~54, rubble 538~546, microlith 359~364, coarse sand 543~603, fine sand 233~259, additive 11.78~13.48, water 180~185, unit kg/m3, comprise the following steps：1) concrete each component feeds intake rubble → microlith → coarse sand → fine sand → cement → miberal powder → flyash → water → additive in the following order；2) stir；3) concrete conveyance；4) cast-in-site；5) scene is detected and observed to the slump flow test and workability of mixture by technological requirement；6) concrete construction finishes conserves after final set.The present invention meets the requirement of no vibrated concrete, solves concrete surface quality common fault, and reduction pours cost of labor.
Description
Technical field
The present invention relates to technical field of concrete, more particularly to a kind of voluntarily closely knit concrete formulation and forming method.
Background technology
In the prior art, the common pump concrete of concrete construction generally use is poured, and operating personnel, which utilize, vibrates
Rod is vibrated, and vibrating spear arrangement will uniformly, and fast insert is pulled out slowly, and will be according to structure type and concrete mix slump size
Situations such as hold vibrating time.The defects of this method of prior art is present be：Because common pumping concrete construction needs to use
Vibrating spear vibrates, and can produce larger noise, and labor intensity is big, time consuming.It is able to may also be caused because of operation horizontal problem
Rotten, even voids and pits, the quality problems such as dew muscle, easily cause potential safety hazard common fault.
The content of the invention
The present invention is aiming at deficiencies of the prior art, there is provided a kind of voluntarily closely knit concrete formulation；This
Invention is self-leveling concrete using voluntarily air-free concrete, with super mobility the advantages of good workability.By using
The B grade mixture material of aggregate, admixture large dosage, the application of high water reducing rate additive, rational sand coarse aggregate ratio etc., meet no vibrated concrete
Requirement, without vibrating, reduce construction noise, can be voluntarily closely knit, voids and pits, rotten can be produced by solving concrete surface
Root, even reveal the common quality defects such as muscle, reduce disturbance of the vibrating spear to concrete protective layer pad and built-in fitting, position is more accurate
Really, pouring cost of labor substantially reduces.
The present invention also provides a kind of forming method of voluntarily closely knit concrete.
The present invention solve technical problem technical scheme be：
A kind of voluntarily closely knit concrete formulation, including following components：Cement, flyash, miberal powder, rubble, microlith, slightly
Sand, fine sand, additive, water, the quality group of each component turn into：Cement 300~405, flyash 80~124, miberal powder 47~
54, rubble 538~546, microlith 359~364, coarse sand 543~603, fine sand 233~259, additive 11.78~13.48, water
180~185, unit kg/m3.
The cement grade is P.O42.5.
The flyash uses thermal power plant fire coal by the byproduct after burning, using II grade of flyash.
The miberal powder uses caused a kind of byproduct in steel mill's production engineering to be used after levigate in concrete, is
S95 levels.
The rubble specification 10-25mm, microlith specification 5-10mm.
The coarse sand is artificial sand, specification M=3.4；Fine sand is natural ultra fine sand, specification M=1.3.
Additive is high-efficiency water-reducing agent of poly-carboxylic acid, water-reducing rate 31%；Water uses drinking water.
Using the concrete formation method of voluntarily closely knit concrete formulation, comprise the following steps：
1) concrete each component feeds intake rubble → microlith → coarse sand → fine sand → cement → miberal powder → powder in the following order
Coal ash → water → additive；
2) stir；
3) concrete conveyance；Conveyed using concrete mixer, concrete drop is not preferably greater than 2m；
4) cast-in-site；
5) scene is detected and observed to the slump flow test and workability of mixture by technological requirement, undesirable
Retract and do not have to；
6) concrete construction is finished after final set, is conserved immediately, or watering or with covered rearing with plastic film, makes concrete
Outer surface keeps moistening more than 14d.
The mixing time of the step 2) is no less than 75s.
The step 4) pours when structure height more than 500mm layereds, and every layer is not more than 500mm, after having poured one layer,
Beaten from bottom to up with iron hammer on the outside of template, struck at negative and positive angle more, run out of concrete bubble；The per car concreting time is not
More than 1h.
Beneficial effects of the present invention：
1. the present invention is self-leveling concrete using voluntarily air-free concrete, there is super mobility and good excellent of workability
Point.Answered by using the B grade mixture material of the aggregates such as rubble, microlith, coarse sand, fine sand, admixture large dosage, high water reducing rate additive
With, rational sand coarse aggregate ratio etc., meet the requirement of no vibrated concrete, without vibrating, reduce construction noise, can be voluntarily closely knit, solution
Concrete surface of having determined can produce voids and pits, rotten, even reveal the common quality defect such as muscle, reduce vibrating spear to concrete protective
The disturbance of layer cushion block and built-in fitting, position is more accurate, and pouring cost of labor substantially reduces, especially suitable for except basic larger volume
Outer all structures (C30-C45 grades).
2. the present invention provides the flyash and miberal powder for having filled reasonable component so that of whole powder --- binder materials
Grade is with more reasonable.
3. coarse aggregate and fine aggregate has been respectively adopted in the aggregates such as the building stones and sand material of the present invention, that is, rubble is respectively adopted,
Microlith, coarse sand, fine sand graduation two technology, stone are respectively 10-25mmh and 5-10mm using thickness two kinds of particles diameter range,
Sand uses two kinds of thickness：Coarse sand is artificial sand, and fine sand is natural ultra fine sand, by sieving and using the proportion scale of the present invention
Ratio, solve the problems, such as that composite demand is not present for prior art this particles of aggregates grading.
4. the material component of the concrete of the present invention forms whole coagulation using the higher material of grain composition area requirement
The more rational grain composition of soil, without vibration coagulation is all met by each strength grade formula for testing four embodiments of the invention
The requirement of soil, also meets slump flow test and 1h slump flow test level 28h compression strength that concrete mix must reach
Index request, while meet without isolation and excreting water phenomenon requirement.Therefore correlation is fully achieved in the concrete mix of the present invention
The technical requirements and index of standard, while pouring molding concrete of the present invention has fully met concrete finished product technical requirements and index will
Ask.
Embodiment
For a better understanding of the present invention, embodiments of the present invention are explained in detail below.
A kind of voluntarily closely knit concrete formulation, including following components：Cement, flyash, miberal powder, rubble, microlith, slightly
Sand, fine sand, additive, water, the quality group of each component turn into：Cement 300~405, flyash 80~124, miberal powder 47~
54, rubble 538~546, microlith 359~364, coarse sand 543~603, fine sand 233~259, additive 11.78~13.48, water
180~185, unit kg/m3.
Cement grade is P.O42.5.
Flyash uses thermal power plant fire coal by the byproduct after burning, using II grade of flyash.
Miberal powder：It is grain slag using caused a kind of byproduct in steel mill's production engineering, is used after levigate in concrete,
For S95 levels.
Rubble specification, 10-25mm, microlith specification 5-10mm.
Coarse sand is artificial sand, specification M=3.4；Fine sand is natural ultra fine sand, specification M=1.3.
Additive is high-efficiency water-reducing agent of poly-carboxylic acid, water-reducing rate 31%.Water uses drinking water.
A kind of concrete formation method using voluntarily closely knit concrete formulation, including step once：
1) concrete each component feeds intake in the following order:Rubble → microlith → coarse sand → fine sand → cement → miberal powder → powder
Coal ash → water → additive；
2) stir；
3) concrete conveyance；Typically conveyed using concrete mixer, concrete drop is not preferably greater than 2m.
4) cast-in-site；
5) scene is detected and observed to the slump flow test and workability of mixture by technological requirement, undesirable
It should immediately retract, must not use.
6) concrete construction is finished after final set, is conserved immediately, or watering or with covered rearing with plastic film, makes concrete
Outer surface keeps moistening more than 14d.
The mixing time of the step 2) must not be less than 75s.
The step 3) is when structure height is more than 500mm, placement layer by layer, and general every layer is not more than 500mm, has poured
After one layer, beaten from bottom to up with iron hammer at once on the outside of template, it is suitably at negative and positive angle to strike more, run out of concrete bubble；Per car
The concreting time must not exceed 1h.
The present invention provides the flyash and miberal powder for having filled reasonable component so that the particle of whole powder --- binder materials
Grading is more reasonable.
Coarse aggregate and fine aggregate has been respectively adopted in the aggregates such as the building stones and sand material of the present invention, that is, rubble has been respectively adopted, carefully
Stone, coarse sand, fine sand graduation two technology, stone are respectively 10-25mmh and 5-10mm using thickness two kinds of particles diameter range, sand
Son uses two kinds of thickness：Coarse sand is artificial sand, and fine sand is natural ultra fine sand, by sieving and using the proportion scale ratio of the present invention
Example, solve the problems, such as that composite demand is not present for prior art this particles of aggregates grading.The present invention provides and has filled reasonable component
Flyash and miberal powder so that the grain composition of whole powder --- binder materials is more reasonable,
The material component of the concrete of the present invention forms whole concrete using the higher material of grain composition area requirement
Compare rational grain composition, by experiment, each strength grade formula of four embodiments of the invention all meets without vibration coagulation
The requirement of soil, also meets slump flow test and 1h slump flow test level 28h compression strength that concrete mix must reach
Index request, while meet without isolation and excreting water phenomenon requirement.
Embodiment 1.
Formula 1：The quality of each component of the present invention is：Cement 300, flyash 124, miberal powder 47, rubble 538, microlith 359,
Coarse sand 603, fine sand 259, additive 11.78, water 180, unit kg/m3.
Embodiment 2.
Formula 2：The quality of each component of the present invention is：Cement 330, flyash 111, miberal powder 49, rubble 543, microlith 362,
Coarse sand 585, fine sand 251, additive 12.25, water 180, unit kg/m3.
Embodiment 3.
Formula 3：The quality of each component of the present invention is：Cement 360, flyash 98, miberal powder 52, rubble 545, microlith 364, slightly
Sand 564, fine sand 242, additive 12.75, water 185, unit kg/m3.
Embodiment 4.
Formula 4：The quality of each component of the present invention is：Cement 405, flyash 80, miberal powder 54, rubble 546, microlith 364, slightly
Sand 543, fine sand 233, additive 13.48, water 185, unit kg/m3.
Four indexs of correlation for being formulated obtained concrete of the above, are shown in Table 1.
Proved by above example verification experimental verification, relevant criterion is fully achieved in concrete mix of the invention
Technical requirements and index：
1st, slump flow test >=700mm；
2nd, 1h slump flow tests >=670mm；
3rd, workability is preferable, no isolation and excreting water phenomenon.
Table 1
Pouring molding concrete surface of the present invention is smooth simultaneously, and perception is good；Dense surface, smooth, color uniformity；Surface
Without obvious construction crack；Control surface bubble, stomata, stomata requires tiny and is evenly distributed, and does not influence perception；Surface is without honeybee
Nest, pitted skin, hole, slag inclusion；Without dew muscle, hidden muscle；Without abrasive band, color spot；Color and former concrete surface color basic one after defect mending
Cause, aberration does not influence perception；Concrete crushing strength meets related request.Concrete finished product technical requirements are fully met and have referred to
Mark requires.
Although the present invention has shown that and described the present invention and applies example, for one of ordinary skill in the art, Ke Yili
Solution can apply example to these in the case where not departing from the principle of the present invention and spirit and carry out a variety of change, modification, replacement and modification, all belong to
In stating within claims for the present invention.
Claims (10)
1. a kind of voluntarily closely knit concrete formulation, it is characterized in that, including following components：Cement, flyash, miberal powder, rubble, carefully
Stone, coarse sand, fine sand, additive, water, the quality group of each component turn into：Cement 300~405, flyash 80~124, miberal powder
47~54, rubble 538~546, microlith 359~364, coarse sand 543~603, fine sand 233~259, additive 11.78~
13.48, water 180~185, unit kg/m3。
2. a kind of voluntarily closely knit concrete formulation as claimed in claim 1, it is characterized in that, the cement grade is
P.O42.5。
3. a kind of voluntarily closely knit concrete formulation as claimed in claim 1, it is characterized in that, the flyash is using firepower hair
Power plant soot is by the byproduct after burning, using II grade of flyash.
4. a kind of voluntarily closely knit concrete formulation as claimed in claim 1, it is characterized in that, the miberal powder is using steel mill's production
A kind of caused byproduct uses after levigate in concrete in engineering, is S95 levels.
5. a kind of voluntarily closely knit concrete formulation as claimed in claim 1, it is characterized in that, the rubble specification 10-25mm,
Microlith specification 5-10mm.
6. a kind of voluntarily closely knit concrete formulation as claimed in claim 1, it is characterized in that, the coarse sand be artificial sand, is advised
Lattice M=3.4；Fine sand is natural ultra fine sand, specification M=1.3.
7. a kind of voluntarily closely knit concrete formulation as claimed in claim 1, it is characterized in that, additive is that polycarboxylic acids efficiently subtracts
Aqua, water-reducing rate 31%；Water uses drinking water.
8. utilize the concrete formation method of the voluntarily closely knit concrete formulation of any one described in claim 1 to 7, its feature
It is to comprise the following steps：
1) concrete each component feeds intake in the following order:Rubble → microlith → coarse sand → fine sand → cement → miberal powder → flyash
→ water → additive；
2) stir；
3) concrete conveyance；Conveyed using concrete mixer, concrete drop is not more than 2m；
4) cast-in-site；
5) scene is detected and observed to the slump flow test and workability of mixture by technological requirement, undesirable to retract
Do not have to；
6) concrete construction is finished after final set, is conserved immediately, or watering or with covered rearing with plastic film, makes concrete appearance
Face keeps moistening more than 14d.
9. concrete formation method as claimed in claim 8, it is characterized in that, the mixing time of the step 2) is no less than 75s.
10. concrete formation method as claimed in claim 8, it is characterized in that, the step 4) is more than 500mm when structure height
Layered pours, and every layer is not more than 500mm, after having poured one layer, is beaten from bottom to up with iron hammer on the outside of template, more at negative and positive angle
Strike, run out of concrete bubble；The per car concreting time is no more than 1h.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711031370.1A CN107601998A (en) | 2017-10-27 | 2017-10-27 | A kind of voluntarily closely knit concrete formulation and forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711031370.1A CN107601998A (en) | 2017-10-27 | 2017-10-27 | A kind of voluntarily closely knit concrete formulation and forming method |
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| CN107601998A true CN107601998A (en) | 2018-01-19 |
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ID=61079579
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109824329A (en) * | 2019-03-06 | 2019-05-31 | 唐山北极熊建材有限公司 | Self-compaction leveling concrete and its preparation method and application |
| CN112661449A (en) * | 2020-12-26 | 2021-04-16 | 江门市富天混凝土有限公司 | Concrete and manufacturing method thereof |
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| CN105645870A (en) * | 2015-12-31 | 2016-06-08 | 上海建工集团股份有限公司 | Self-compaction bare concrete and preparation method thereof |
| CN105801053A (en) * | 2016-03-16 | 2016-07-27 | 武汉源锦商品混凝土有限公司 | Self-compacting concrete with high content of fly ash C40 |
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2017
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105645870A (en) * | 2015-12-31 | 2016-06-08 | 上海建工集团股份有限公司 | Self-compaction bare concrete and preparation method thereof |
| CN105801053A (en) * | 2016-03-16 | 2016-07-27 | 武汉源锦商品混凝土有限公司 | Self-compacting concrete with high content of fly ash C40 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109824329A (en) * | 2019-03-06 | 2019-05-31 | 唐山北极熊建材有限公司 | Self-compaction leveling concrete and its preparation method and application |
| CN109824329B (en) * | 2019-03-06 | 2021-11-09 | 唐山北极熊建材有限公司 | Self-compacting leveling concrete and preparation method and application thereof |
| CN112661449A (en) * | 2020-12-26 | 2021-04-16 | 江门市富天混凝土有限公司 | Concrete and manufacturing method thereof |
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Application publication date: 20180119 |